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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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31.43ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

31.43ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

37.6 x 16.4 mm

$ 31.31

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1.25ct Multicolor Opal, Oval, Transparent

1.25ct Multicolor Opal, Oval, Transparent

10 x 7 mm (calibrated)

$ 31.13

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1.97ct Brown Rutile Topaz, Pear Shape, Transparent

1.97ct Brown Rutile Topaz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 40.88

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1.42ct Pink Tourmaline, Emerald Cut, VS

1.42ct Pink Tourmaline, Emerald Cut, VS

9.2 x 5.1 mm

$ 165.00

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1.05ct Yellow Chrysoberyl, Oval, VVS-VS

1.05ct Yellow Chrysoberyl, Oval, VVS-VS

7.2 x 5.2 mm

$ 122.44

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30.28ct Black Obsidian, Oval, Opaque

30.28ct Black Obsidian, Oval, Opaque

32.6 x 21 mm

$ 26.54

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4.54ct Violet Amethyst, Pear Shape, VVS

4.54ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 29.84

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5.05ct Yellow Citrine, Oval, VVS-VS

5.05ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 30.32

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0.67ct Purple Spinel, Cushion, VVS-VS

0.67ct Purple Spinel, Cushion, VVS-VS

5.4 x 4.5 mm

$ 46.71

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1.70ct Multicolor Opal, Oval, Transparent

1.70ct Multicolor Opal, Oval, Transparent

10.2 x 7.4 mm

$ 32.27

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0.49ct Orange Citrine, Marquise, VVS-VS

0.49ct Orange Citrine, Marquise, VVS-VS

8.2 x 4.2 mm

$ 3.42

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10.87ct Multicolor Coral, Oval, Translucent

10.87ct Multicolor Coral, Oval, Translucent

19.2 x 15.2 mm

$ 23.81

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11.55ct Red Almandine Garnet, Oval, VVS-VS
Almandine Garnet Product Video (732462)

11.55ct Red Almandine Garnet, Oval, VVS-VS

16.7 x 11 mm

$ 345.11

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11.22ctw Yellow Rutile Quartz, Round, Transparent

11.22ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 30.61

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0.60ct Yellow Zircon, Oval, VVS

0.60ct Yellow Zircon, Oval, VVS

5.2 x 4 mm

$ 8.96

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1.12ct Green Tourmaline, Baguette, VVS-VS

1.12ct Green Tourmaline, Baguette, VVS-VS

9.3 x 3.7 mm

$ 39.04

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6.41ct Multicolor Pietersite, Pear Shape, Opaque

6.41ct Multicolor Pietersite, Pear Shape, Opaque

17.5 x 11.7 mm

$ 21.28

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2.93ct Turquoise Larimar, Pear Shape, Opaque

2.93ct Turquoise Larimar, Pear Shape, Opaque

12 x 8 mm (calibrated)

$ 35.00

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5.03ct Yellow Citrine, Oval, VVS-VS

5.03ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 30.20

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20.09ct Multicolor Rhodochrosite, Pear Shape, Opaque

20.09ct Multicolor Rhodochrosite, Pear Shape, Opaque

27.4 x 14.6 mm

$ 55.02

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2.94ct Brown Cat'S Eye Scapolite, Oval, Translucent

2.94ct Brown Cat'S Eye Scapolite, Oval, Translucent

10 x 7 mm (calibrated)

$ 8.06

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23.96ct Violet Amethyst, Emerald Cut, VVS

23.96ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 167.05

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1.18ct Purple Spinel, Cushion, VS

1.18ct Purple Spinel, Cushion, VS

6.4 x 5.9 mm

$ 117.53

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0.98ct Purple Spinel, Cushion, VVS-VS

0.98ct Purple Spinel, Cushion, VVS-VS

6.3 x 5.4 mm

$ 53.68

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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